<p>This research delves into the thermodynamics and lubrication of ultra-high-speed dry gas seals vital for crucial equipment. It develops an energy equation that includes heat transfer, gas states, and corrections for centrifugal and turbulence effects. The accuracy of the model, which is combined with the turbulent Reynolds equation, to predict performance is confirmed experimentally. Findings show that when considering heat transfer processes, leakage rate increases with rising rotational speed and pressure. Opening force exhibits an initial slight decrease, then gradually increases with increasing rotational speed, whereas it increases with elevated medium pressure. The variation trend of the stiffness leakage ratio is exactly opposite that of the opening force. Optimized groove parameters are provided for various performance, stability, and overall demands.</p>